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Title:Dispersed plug flow model for upflow anaerobic sludge bed reactors with focus on granular sludge dynamics
Authors: S. Kalyushnyi ; Viatcheslav Fedorovich ; P. Lens
Date:Mar 2006
Publication Title:Journal of Industrial Microbiology and Biotechnology
Publication Type:Journal Article Publication Status:Published
Volume No:33(3) Page Nos:221-237
DOI:10.1007/s10295-005-0217-2 ISBN/ISSN:1476-5535
A new approach to model upflow anaerobic sludge bed (UASB)-reactors, referred to as one-dimensional dispersed plug flow model, was developed. This model focusses on the granular sludge dynamics along the reactor height, based on the balance between dispersion, sedimentation and convection using one-dimensional (with regard to reactor height) equations. A universal description of both the fluid hydrodynamics and granular sludge dynamics was elaborated by applying known physical laws and empirical relations derived from experimental observations. In addition, the developed model includes: (1) multiple-reaction stoichiometry, (2) microbial growth kinetics, (3) equilibrium chemistry in the liquid phase, (4) major solid-liquid-gas interactions, and (5) material balances for dissolved and solid components along the reactor height. The integrated model has been validated with a set of experimental data on the start-up, operation performance, sludge dynamics, and solute intermediate concentration profiles of a UASB reactor treating cheese whey [Yan et al. (1989) Biol Wastes 27:289-305; Yan et al. (1993) Biotechnol Bioeng 41: 700-706]. A sensitivity analysis of the model, performed with regard to the seed sludge characteristics and the key model parameters, showed that the output of the dispersed plug flow model was most influenced by the sludge settleability characteristics and the growth properties of both protein-degrading bacteria and acetotrophic methanogens.
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Bibtex format
author = { S. Kalyushnyi and Viatcheslav Fedorovich and P. Lens },
title = {Dispersed plug flow model for upflow anaerobic sludge bed reactors with focus on granular sludge dynamics},
journal = {Journal of Industrial Microbiology and Biotechnology},
publisher = {Springer},
year = 2006,
month = {Mar},
volume = {33(3)},
pages = {221-237},
doi = {10.1007/s10295-005-0217-2},

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